opto isolator and r/c

[jandirks]

Newbie alert!

Hi,

I fly radio control airplanes and sometimes experience interference problems. Probably you understand this can cause crashes and I don't want that. To eliminate most of the problems, I have thought about using an opto isolator.

Between the receiver and each component (motor controller and servo's) are 3 wires (+, - and signal, 4.8-6v).

I have no electronics experience at all, anyone that can point me a direction where to find information about this?

Thanks in advance!

 

[Nigel Goodwin]

I wouldn't have thought that's a likely cure for any interference?, at that point the signal is a digital one (actually PWM) at logic levels, and will be very immune to interference.

If you're getting interference problems it's far more likely to be entering via the aerial input!.

 

[jandirks]

Thanks for your response!

I am not an expert on interference problems and I only know about it from what I have read. Seems that most interference is comming going from the speed controller (motor controller) and originates from the motor.

For people with no r/c knowledge:

The speed controller (esc - electronics speed controller) is powered by a battery. The esc 'forwards' power to the receiver and the brushless motor.

Edit: Last sentence was not ok, changed.

 

[Nigel Goodwin]

Thanks for your response!

I am not an expert on interference problems and I only know about it from what I have read. Seems that most interference is comming going from the speed controller (motor controller) and originates from the motor.

For people with no r/c knowledge:

The receiver is speed controller (esc - electronics speed controller) is powered by a battery. The esc 'forwards' power to the receiver and the brushless motor.

Are you sure that's where it's coming from?, a brushless motor is usually pretty good in that respect (unlike brushed motors).

 

[jandirks]

Nigel,

Not 100% sure if it's comming from the motor, but at least it is going from the esc to the receiver.

So, if I can pass the signal through an opto isolator, preferably without the need for extra batteries, that would be great.

I really have no idea where too look at, that is why I posted here.